【摘要】 目的研究有限元法在空间砌体结构分析中应用的可行性,并提出模拟砌体带裂缝损伤状态的有限元建模及分析方法.方法进行砌体结构模型拟静力试验及脉动测试,并采用等效体积单元法对空间砌体结构模型进行有限元分析.在对有限元模型的优化更新研究中,以损伤状态下的识别刚度作为目标函数,根据结构位移、抗侧移刚度及外荷载三者的内在关系,通过调整弹性模量优化有限元模型来模拟砌体带裂缝工作状态,并对比拟静力试验及动态测试识别结果进行理论分析.结果利用所提出的有限元建模及分析方法很好地模拟了砌体结构完好及带裂缝损伤状态下的工作特性,有限元模型计算分析结果与实测值具有良好的一致性.结论采用等效体积单元(RVE)可以准确模拟空间砌体结构的材料特性.利用动态测试数据结合反演理论进行结构模型的优化更新方法可有效模拟砌体结构的带裂缝工作状态,并有效地考虑砌体材料的离散性问题.更多还原

【Abstract】 The pseudo-static experiment and pulsating test are performed with a three-story masonry of half scale model,and the representative volume element(RVE) is adopted to simulate non-linear analysis of spatial masonry structure.Then,based on the vibration reverse problem theory and optimizing design method,a new finite element analysis method is proposed for masonry structure in crack state,which is improved through the proper correlation definition of displacement,resisting stiffness and force.The elastic module and remain stiffness are defined respectively as independent variable and objective function,and the optimizing analysis of masonry model is performed.Analysis and experiment results including displacement and inherent frequency are given to demonstrate the validation of the finite element analysis method.更多还原